<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <script>
      var windowUrl = decodeURIComponent(window.location.search.substring(3))
      var opened = window.open(windowUrl, '', 'show=no')
      window.addEventListener('message', function (event) {
        try {
          opened.close()
        } finally {
          console.log(event.data)
        }
      })
    </script>
  </head>
  <body>
  </body>
</html>
